| /* |
| * Copyright (c) 2017 Arm Limited. |
| * |
| * SPDX-License-Identifier: MIT |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in all |
| * copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| #include "helpers.h" |
| #include "non_linear_filter_helpers.h" |
| |
| /** This function applies a non linear filter on a 3x3 box basis on an input image. |
| * |
| * @note The needed filter operation is defined through the preprocessor by passing either -DMIN, -DMAX or -DMEDIAN. |
| * |
| * @param[in] src_ptr Pointer to the source image. Supported data types: U8 |
| * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8 |
| * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) |
| * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) |
| * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image |
| */ |
| __kernel void non_linear_filter_box3x3( |
| IMAGE_DECLARATION(src), |
| IMAGE_DECLARATION(dst)) |
| { |
| Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| Image dst = CONVERT_TO_IMAGE_STRUCT(dst); |
| |
| // Load values |
| uchar16 top = vload16(0, offset(&src, -1, -1)); |
| uchar16 middle = vload16(0, offset(&src, -1, 0)); |
| uchar16 bottom = vload16(0, offset(&src, -1, 1)); |
| |
| // Apply respective filter |
| #ifdef MIN |
| uchar16 tmp = min(top, min(middle, bottom)); |
| uchar8 out = row_reduce_min_3(tmp); |
| #elif defined(MAX) |
| uchar16 tmp = max(top, max(middle, bottom)); |
| uchar8 out = row_reduce_max_3(tmp); |
| #elif defined(MEDIAN) |
| uchar8 p0 = top.s01234567; |
| uchar8 p1 = top.s12345678; |
| uchar8 p2 = top.s23456789; |
| uchar8 p3 = middle.s01234567; |
| uchar8 p4 = middle.s12345678; |
| uchar8 p5 = middle.s23456789; |
| uchar8 p6 = bottom.s01234567; |
| uchar8 p7 = bottom.s12345678; |
| uchar8 p8 = bottom.s23456789; |
| uchar8 out = sort9(p0, p1, p2, p3, p4, p5, p6, p7, p8); |
| #else /* MIN or MAX or MEDIAN */ |
| #error "Unsupported filter function" |
| #endif /* MIN or MAX or MEDIAN */ |
| |
| // Store result |
| vstore8(out, 0, dst.ptr); |
| } |
| |
| /** This function applies a non linear filter on a 3x3 cross basis on an input image. |
| * |
| * @note The needed filter operation is defined through the preprocessor by passing either -DMIN, -DMAX or -DMEDIAN. |
| * |
| * @param[in] src_ptr Pointer to the source image. Supported data types: U8 |
| * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8 |
| * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) |
| * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) |
| * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image |
| */ |
| __kernel void non_linear_filter_cross3x3( |
| IMAGE_DECLARATION(src), |
| IMAGE_DECLARATION(dst)) |
| { |
| Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| Image dst = CONVERT_TO_IMAGE_STRUCT(dst); |
| |
| // Load values |
| uchar8 top = vload8(0, offset(&src, 0, -1)); |
| uchar16 middle = vload16(0, offset(&src, -1, 0)); |
| uchar8 bottom = vload8(0, offset(&src, 0, 1)); |
| |
| // Apply respective filter |
| #ifdef MIN |
| uchar8 tmp_middle = row_reduce_min_3(middle); |
| uchar8 out = min(tmp_middle, min(top, bottom)); |
| #elif defined(MAX) |
| uchar8 tmp_middle = row_reduce_max_3(middle); |
| uchar8 out = max(tmp_middle, max(top, bottom)); |
| #elif defined(MEDIAN) |
| uchar8 p0 = top.s01234567; |
| uchar8 p1 = middle.s01234567; |
| uchar8 p2 = middle.s12345678; |
| uchar8 p3 = middle.s23456789; |
| uchar8 p4 = bottom.s01234567; |
| uchar8 out = sort5(p0, p1, p2, p3, p4); |
| #else /* MIN or MAX or MEDIAN */ |
| #error "Unsupported filter function" |
| #endif /* MIN or MAX or MEDIAN */ |
| |
| // Store result |
| vstore8(out, 0, dst.ptr); |
| } |
| |
| /** This function applies a non linear filter on a 3x3 disk basis on an input image. |
| * |
| * @note The needed filter operation is defined through the preprocessor by passing either -DMIN, -DMAX or -DMEDIAN. |
| * |
| * @param[in] src_ptr Pointer to the source image. Supported data types: U8 |
| * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8 |
| * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) |
| * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) |
| * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image |
| */ |
| __kernel void non_linear_filter_disk3x3( |
| IMAGE_DECLARATION(src), |
| IMAGE_DECLARATION(dst)) |
| { |
| Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| Image dst = CONVERT_TO_IMAGE_STRUCT(dst); |
| |
| // Load values |
| uchar16 top = vload16(0, offset(&src, -1, -1)); |
| uchar16 middle = vload16(0, offset(&src, -1, 0)); |
| uchar16 bottom = vload16(0, offset(&src, -1, 1)); |
| |
| // Apply respective filter |
| #ifdef MIN |
| uchar16 tmp = min(top, min(middle, bottom)); |
| uchar8 out = row_reduce_min_3(tmp); |
| #elif defined(MAX) |
| uchar16 tmp = max(top, max(middle, bottom)); |
| uchar8 out = row_reduce_max_3(tmp); |
| #elif defined(MEDIAN) |
| uchar8 p0 = top.s01234567; |
| uchar8 p1 = top.s12345678; |
| uchar8 p2 = top.s23456789; |
| uchar8 p3 = middle.s01234567; |
| uchar8 p4 = middle.s12345678; |
| uchar8 p5 = middle.s23456789; |
| uchar8 p6 = bottom.s01234567; |
| uchar8 p7 = bottom.s12345678; |
| uchar8 p8 = bottom.s23456789; |
| uchar8 out = sort9(p0, p1, p2, p3, p4, p5, p6, p7, p8); |
| #else /* MIN or MAX or MEDIAN */ |
| #error "Unsupported filter function" |
| #endif /* MIN or MAX or MEDIAN */ |
| |
| // Store result |
| vstore8(out, 0, dst.ptr); |
| } |